Answer :
The patient will burn 338 kcal if they work out at this intensity for 45 minutes.
kilocalories (kcal) burned during exercise,
Kcal burned = (VO2 × body weight in kg × duration in minutes) / 1000
Weight in kg = Weight in lbs / 2.2046
W = 165 / 2.2046 = 74.84 kg
Kcal burned = (20 × 74.84 × 45 ) / 1000
Kcal burned = 337.932 kcal.
Hence, the patient will burn 338 kcal if they work out at this intensity for 45 minutes.
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The patient will burn approximately 336.78 kilocalories during 45 minutes of exercise at a VO2 of 20 mL/kg/min. Given the options, the closest value is 338 kcal (option d).
To calculate the number of kilocalories burned during a workout, we need to use the provided VO2 value, the individual's weight, and the duration of the exercise.
First, convert the weight from pounds to kilograms: 165 lbs / 2.20462 = 74.84 kg.Next, calculate the total VO2 consumption for 45 minutes: 20 mL/kg/min * 74.84 kg * 45 min = 67,356 mL of O2.Convert the total VO2 to liters: 67,356 mL / 1,000 = 67.356 L of O2.Each liter of O2 consumed burns approximately 5 kilocalories: 67.356 L * 5 kcal/L = 336.78 kcal.Based on the calculation, the patient will burn approximately 336.78 kcal during the 45-minute workout. Therefore, the closest option is d. 338 kcal.
Complete question
Your patient is walking at a VO2 of 20mL/kg/min on the treadmill and weighs 165lbs. How many kilocalories will they burn if they work out at this intensity for 45 minutes?
a.246 kcal
b.278 kcal
c.303 kcal
d.338 kcal
